why does my computer monitor keep blinking on and off

If your computer screen is flashing on and off, it could be an indication that the monitor is failing. Some computer settings, however, can cause the monitor to flicker or turn off. Windows 7 automatically turns off the monitor after a set period of time, and certain screen settings can produce a repetitive flash. The screen may also flash on and off if the power or data cable connections are loose. Click the battery icon found on the far right of the taskbar. Click More Power Options. Click Choose When to Turn Off the Display. Change the drop-down menus next to Turn Off the Display to Never, then click Save Changes. Hold down the Windows logo key, then press the D, to go to the desktop. Right-click the desktop, then click Screen Resolution. Click Advanced Settings. Go to the Monitor tab then select a refresh rate in the range of 72 Hz to 85 Hz. Click OK twice. Press the power button to turn off the monitor if the problem continues to occur.

Check the power cable connected to the back of the screen. If the power cable is loose, push the connector into the power slot on the back of the monitor until you meet resistance. Confirm the other end of the power cable is completely connected to the outlet. If the power cable is connected securely to both the outlet and the monitor, but the screen continues to flash on and off, use another power cable to test if the issue is related to the cable itself. Check the cable connection on the back of the computer and on the back of the monitor. Reconnect one end of the video cable to the back of the monitor, then tighten the thumbscrews in place. Reconnect the other end of the video cable to the back of the computer, then tighten the thumbscrews. Replace the video cable if the problem continues. Check the indicator light when the monitor flashes off.

If the indicator light is flashing green or glowing amber, the problem may not be the screen, but the computer. Disconnect the video cable when the monitor flashes off; if a message such as No Signal Could Be Found appears on the screen, the video adapter could be at fault. If the indicator light is off, then the monitor is most likely defective.The main issue is the monitor keeps blinking. It tries to turn on for 2 secs but shuts off again. This goes on a loop. Its not just losing signal from pc, it literally looses power as indicated by power light turning off. I turn the monitor back on after I had just shut it off. This would keep on happening for about 15 to 30 minutes. This is regardless of whether I shut down the pc itself or just press the power button on the monitor to turn it off. Please note though that it would work just fine when I initially turn it on, meaning when its not been used for a few hours prior.

Troubleshooting steps I've done so far: 1. Replace cables - done that. replaced dvi, vga, and power cable. Issue still happening. 2. Plugged it into the gpu and mobo directly - no dice. 3. Self test by removing dvi cable and powering it on - hit or a miss. Most of the time it would pass. Interestingly, though, I notice that it would turn on when the DVI is unplugged. But if I plug the dvi cable back in, issue would happen again. Like it doesn't have enough juice to show the picture from the pc so it shuts down. Anyway, to fix this, I would have to wait for like 30 mins prior to turning it off, before I can use it again. Which is really bad news if I'm in a hurry, or perhaps a program just needs a quick restart. What do you reckon is wrong with my monitor? And is it possible to fix it myself? ( I can solder and stuff).